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A 12 inch horn loaded MTM top: 12NDL76 and N314T-8
A 12 inch horn loaded MTM top: 12NDL76 and N314T-8
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Old 22nd November 2017, 07:04 PM   #41
turk 182 is offline turk 182  Canada
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ignore that last question i looked back in the thread and got my own answer.
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Old 22nd November 2017, 08:44 PM   #42
msibilia is offline msibilia  United States
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Quote:
Originally Posted by chris661 View Post
You need to ask on ProSoundWeb.

Chris
It is just that there is not much DIY on ProSoundWeb. I try to keep a low profile there since I am not doing this for hire yet. Soundforums.net has some DIY, but not much action.

Marc
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Old 22nd November 2017, 09:58 PM   #43
turk 182 is offline turk 182  Canada
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ever look around here :Speakerplans.com Forums
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Old 22nd November 2017, 10:53 PM   #44
djk is offline djk
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+1

(speakerplans)
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Old 23rd November 2017, 05:03 PM   #45
Kay Pirinha is offline Kay Pirinha  Germany
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msibilia, would you mind sharing your drawings?

Best regards!
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Old 1st January 2018, 12:17 PM   #46
msibilia is offline msibilia  United States
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I finally got around to plotting up the polar data I took back in September. The horizontal looks very good at +-30 degrees and tilts down gradually and smoothly. There is slight waistbanding at 1500 Hz, but blends well to the directivity of the mid horn. Horizontal data were taken at 15, 30 and 45 degrees each direction and averaged.

The vertical is definitely more of a mess off axis, but it is within 3 dB to +- 20 degrees, so it should be very good for outdoor events where everyone is at roughly the same elevation. Vertical data were taken at 10, 20, 30, 40, and 45 degrees in each direction and averaged.

Quote:
msibilia, would you mind sharing your drawings?
I hope to get to making some drawings soon. But I move kind of slowly on my projects lately.

Marc
Attached Images
File Type: jpg Horizontal.jpg (61.3 KB, 224 views)
File Type: jpg Vertical.jpg (67.8 KB, 224 views)
File Type: png Horizontal FR small.png (37.7 KB, 222 views)
File Type: png Vertical FR small.png (50.3 KB, 221 views)
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Old 3rd February 2018, 02:47 PM   #47
mark100 is offline mark100  United States
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Quote:
Originally Posted by msibilia View Post
I finally got around to plotting up the polar data I took back in September. The horizontal looks very good at +-30 degrees and tilts down gradually and smoothly. There is slight waistbanding at 1500 Hz, but blends well to the directivity of the mid horn. Horizontal data were taken at 15, 30 and 45 degrees each direction and averaged.

The vertical is definitely more of a mess off axis, but it is within 3 dB to +- 20 degrees, so it should be very good for outdoor events where everyone is at roughly the same elevation. Vertical data were taken at 10, 20, 30, 40, and 45 degrees in each direction and averaged.



I hope to get to making some drawings soon. But I move kind of slowly on my projects lately.

Marc
Great project Marc ! Saw you on Peter's Soundforum DIY thread....
I especially like the way it's all engineered to fit in your van, and that it's a one man groundstack..
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Old 4th February 2018, 02:39 AM   #48
swapnilsound is offline swapnilsound
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Looks good parameters you are given, but I would like to build at my own
When you put Drawing and detailed plan of it..?
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